diff --git a/src/libs/utils/transientscroll.cpp b/src/libs/utils/transientscroll.cpp
index 1d3df1259d8..3a0a9153769 100644
--- a/src/libs/utils/transientscroll.cpp
+++ b/src/libs/utils/transientscroll.cpp
@@ -365,13 +365,23 @@ ScrollBar::~ScrollBar()
 
 void ScrollBar::flash()
 {
-    if (!d->flashed && style()->styleHint(QStyle::SH_ScrollBar_Transient, nullptr, this)) {
+    if (!style()->styleHint(QStyle::SH_ScrollBar_Transient, nullptr, this))
+        return;
+
+    if (!isEnabled()) {
+        d->flashed = false;
+        hide();
+        return;
+    }
+
+    if (!d->flashed) {
         d->flashed = true;
         if (!isVisible())
             show();
         else
             update();
     }
+
     if (!d->flashTimer)
         d->flashTimer = startTimer(0);
 }
diff --git a/src/plugins/qmldesigner/components/timelineeditor/timelinewidget.cpp b/src/plugins/qmldesigner/components/timelineeditor/timelinewidget.cpp
index f6e9a3ad27c..b05083ff054 100644
--- a/src/plugins/qmldesigner/components/timelineeditor/timelinewidget.cpp
+++ b/src/plugins/qmldesigner/components/timelineeditor/timelinewidget.cpp
@@ -538,12 +538,17 @@ void TimelineWidget::invalidateTimelinePosition(const QmlTimeline &timeline)
 
 void TimelineWidget::setupScrollbar(int min, int max, int current)
 {
-    bool b = m_scrollbar->blockSignals(true);
-    m_scrollbar->setRange(min, max);
-    m_scrollbar->setValue(current);
-    m_scrollbar->setSingleStep((max - min) / 10);
-    m_scrollbar->blockSignals(b);
-    m_scrollbar->flash();
+    int singleStep = (max - min) / 10;
+
+    if (m_scrollbar->minimum() != min || m_scrollbar->maximum() != max
+        || m_scrollbar->value() != current || m_scrollbar->singleStep() != singleStep) {
+        bool b = m_scrollbar->blockSignals(true);
+        m_scrollbar->setRange(min, max);
+        m_scrollbar->setValue(current);
+        m_scrollbar->setSingleStep(singleStep);
+        m_scrollbar->blockSignals(b);
+        m_scrollbar->flash();
+    }
 }
 
 void TimelineWidget::setTimelineId(const QString &id)
@@ -575,6 +580,7 @@ void TimelineWidget::setTimelineActive(bool b)
         m_toolbar->setVisible(true);
         m_graphicsView->setVisible(true);
         m_rulerView->setVisible(true);
+        m_scrollbar->setEnabled(true); // Set the transient scrollbar enabled to be able to flash it.
         m_scrollbar->setVisible(true);
         m_addButton->setVisible(false);
         m_onboardingContainer->setVisible(false);
@@ -584,6 +590,8 @@ void TimelineWidget::setTimelineActive(bool b)
         m_toolbar->setVisible(false);
         m_graphicsView->setVisible(false);
         m_rulerView->setVisible(false);
+        m_scrollbar->setEnabled(
+            false); // Set the transient scrollbar disabled to prevent it from being flashed.
         m_scrollbar->setVisible(false);
         m_statusBar->clear();
         m_addButton->setVisible(true);
diff --git a/src/plugins/qmldesigner/components/transitioneditor/transitioneditorwidget.cpp b/src/plugins/qmldesigner/components/transitioneditor/transitioneditorwidget.cpp
index 6cb9c285be7..235722e4c8f 100644
--- a/src/plugins/qmldesigner/components/transitioneditor/transitioneditorwidget.cpp
+++ b/src/plugins/qmldesigner/components/transitioneditor/transitioneditorwidget.cpp
@@ -231,6 +231,7 @@ void TransitionEditorWidget::setTransitionActive(bool b)
         m_toolbar->setVisible(true);
         m_graphicsView->setVisible(true);
         m_rulerView->setVisible(true);
+        m_scrollbar->setEnabled(true); // Set the transient scrollbar enabled to be able to flash it.
         m_scrollbar->setVisible(true);
         m_addButton->setVisible(false);
         m_onboardingContainer->setVisible(false);
@@ -240,6 +241,8 @@ void TransitionEditorWidget::setTransitionActive(bool b)
         m_toolbar->setVisible(false);
         m_graphicsView->setVisible(false);
         m_rulerView->setVisible(false);
+        m_scrollbar->setEnabled(
+            false); // Set the transient scrollbar disabled to prevent it from being flashed.
         m_scrollbar->setVisible(false);
         m_addButton->setVisible(true);
         m_onboardingContainer->setVisible(true);
@@ -378,12 +381,17 @@ TransitionEditorToolBar *TransitionEditorWidget::toolBar() const
 
 void TransitionEditorWidget::setupScrollbar(int min, int max, int current)
 {
-    bool b = m_scrollbar->blockSignals(true);
-    m_scrollbar->setMinimum(min);
-    m_scrollbar->setMaximum(max);
-    m_scrollbar->setValue(current);
-    m_scrollbar->setSingleStep((max - min) / 10);
-    m_scrollbar->blockSignals(b);
+    int singleStep = (max - min) / 10;
+
+    if (m_scrollbar->minimum() != min || m_scrollbar->maximum() != max
+        || m_scrollbar->value() != current || m_scrollbar->singleStep() != singleStep) {
+        bool b = m_scrollbar->blockSignals(true);
+        m_scrollbar->setRange(min, max);
+        m_scrollbar->setValue(current);
+        m_scrollbar->setSingleStep(singleStep);
+        m_scrollbar->blockSignals(b);
+        m_scrollbar->flash();
+    }
 }
 
 void TransitionEditorWidget::showEvent([[maybe_unused]] QShowEvent *event)